S
M
T
W
T
F
S
26
89°
77°
27
91°
76°
28
94°
79°
29
93°
75°
30
93°
77°
1
86°
66°
2
76°
59°
3
82°
64°
4
87°
74°
5
89°
75°
6
98°
73°
7
84°
69°
8
80°
71°
9
87°
74°
10
90°
72°
11
92°
73°
12
91°
73°
13
92°
74°
14
92°
74°
15
90°
71°
16
86°
74°
17
87°
73°
18
91°
73°
19
92°
75°
20
93°
75°
21
93°
74°
22
92°
72°
23
87°
70°
24
89°
75°
25
92°
75°
26
89°
71°
27
88°
71°
28
88°
74°
29
89°
73°
30
89°
77°
31
88°
76°
1
89°
74°
2
90°
74°
3
90°
77°
4
91°
77°
5
91°
78°
6
92°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Weslaco
Weslaco's May 2026 forecast shows daily high temperatures ranging from 76° to 98°, with overnight lows between 59° and 78°. The average high for May is 89° with an average low of 73°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Weslaco. See also: June | July | August.
